Mold or centering device.



J. E. DUDLEY.

' MOLD 0B. OENTEBIHG DEVICE.

APPLICATION FILED APB.1B.1908.

Patented Jan. 19, 1909.

wmmm M Ill JOHN EDWARD DOOLEY, Ol FOND DU LAC, WISCONSIN.

MOLD OR CENTERING DEVICE.

Specification of Letters Patent.

. Application filed. April 18, 1908.

Patented Jan. 19, 1909.

Serial No. 27,862.

T all whom it may concern:

I Be it known that I, JOHN EDWARD DOOLEY, a citizen of the United States, residing at Fond du Lac, in the county of Fond du Lac and State of Wisconsin, have invented a new and useful Mold or Centering Device, of which the lollowing 1s a specification.

Th s invention relates to molds or centering devices of that general class especinlly culverts of diilerent sizes and shapes.

A. further object of the invention is to provide a centering device including an expansible shell having a threaded actuating 'l'OEl disposed within the Sill 11L and oper etively connected with the shell through the medium ot a plurality of radiating arms or links so that by adjusting the rod the arms may be actuated to contract the shell thereby to permit its removal from the culvert.

A further object is to form one terminal of the expunsible shell with a. sleeve or collar adapted to engage the end of an adjacent shell section whereby several. of said sections inuy united.

further object is to provide improved menus for locking the over-lapped ends of the yie. leblc shell in adjusted position.

A still further object of the invention is generally to improve this class of devices as to increase their utility, din'zibility and efiiciency.

Further objects and udvnnluges will up pear in the following description, it l'ieing understood that various changes in forni, proportions and minor details oi? construc tion may be resorted to within the scope of the appended. clnims.

1n the uccon'1 inuying d wings forming :1 part of this specification: Figure l is a longitudinal sectional view of a mold or contering deviceconstructedin accordance with any invention. Fig.2. is njtrunsverse sectional view takenv on the line 22 of Fig. 1-. -F 1g?) is a detail perspective view of a por-' tion of one end of the expzinsible shell showing the construction oflhc locking device.

Idig. .l is :ifverticnl sectional view of the -.locl ng device.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The improved mold forming the Sub ect mutter of the present invention includes a cyliiulricul body portion 5 preferably in the form of :1 longitudinally split shell the adjacent ends of which are overlapped nt 6 so us to ullow for expansion and contraction of the shell when constructing sewers or culvcrts of dillercnt cross sectional diameters.

The interior walls of the shell are reinforced and strengthened by the provision of :1 plurality. of spaced longitiulinnlly disposed burs preferably in the form of angle irons, as shown, and each having one teruiiunl thcreo'fspuced from the adjacent end of the shell to produce a smooth interior surface 9 extending around the entire circuiulcrcncc of the shell. The opposite ends of the angle burs S are off set at 10 and eX- tended loi tudinully beyond the adjacent end of the shell to form :1 support for a lcriuinul coupling collur or sleeve 11. The sleeve or collur ll interposed between the oil set portion of the bars 10 and the interior walls of the shell 5, said collar being rigidly swrurcd lo the shell and split transversely so us to permit the some to expand and con tract with the shell.

Disposed within the shell 5 are longitudinal rod sections 12 and 13 united by asuitable cou 'ilingg' nuuubcr Li and each provided with right and. left hand threads, as shown, there bein corrcspoiulingly threaded collars l5 slidubly mounlcd on the rod sections and {)l'Ov'lilffCl with laterally extending cars 16. The colln i5 nrc onerotivcly connected with the interior of the s iell through the medium of radiating arms or links 17 one end of ouch o'l. which is pivotully connected to the :uljnccni. car '16 while the opposite end thereof is pivotully cmlncctcd at 19 with the lntcrnl'llungc 20 of the uuglc bars, as shown.

The outer end ollhcprod section 13is 1o 7 \iuled with :1 hand wheel. 21 so that by rotat- --ing the wheel the :lllllS or links 17 may be actuated to efl'cct the expansion and c0ntraclion ot the shell.

The over-lapped ends of the shell 5 are provided. with interlocking teeth 21, the

. letter being preferably formed by cutting or [portion thereof lntern-lly' in the direction (if- I ported by the extended end s of the angle as my own, I have hereto affixed my signabms, an actuating rod extending longituditure in the presence 0t two witneeses.

nally Within the shell and links forming a pivotal connection between the actuating JOHN DOOLEY' 5 rod and angle bars for effecting the contrac- Witnesses:

tion and expansion of the shell. E. G. Kmmncn,

In testimony that I claim the foregoing JOHN 1. KALT. 

